Rocker-ring for electrical machines.



No. 761,985. PATENTED JUNE 7, 1904 R. NORRIS.

ROCKER RING FOR ELECTRICAL MAGHINES.

APPLICATION FILED SEPT. 16. 1903. K0 MODEL. 2 SHEETS-SHEET 1.

WITNESSES:

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PATENTED JUNE 7, 1904.

7 E. R. NORRIS. ROCKER RING FOR ELECTRICAL MACHINES.

APPLICATION FILED SEPT, 16. 1903'.

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UNITED STATES Patented June *7, 1904.

PATENT OFFICE.

EDSON R. NORRIS, OF 1V ILKINSBURG, PENNSYLVANIA, ASSIGNOR TOWESTINGHOUSE ELECTRIC & MANUFACTURING (JOB'IPANY, A (JOB- PORATION OFPENNSYLVANIA.

ROCKER-RING FOR ELECTRICAL MACHINES.

SPECIFICATION forming part of Letters Patent No. 761,985, dated June '7,1904. Application filed September 16, 1903. Serial No. 173,482. (Nomodel.)

T all 1071/0721 it many concern:

Be it known that I, Enson RYMAN Nonnrs, a citizen of the United States,and a resident of \Vilkinsburg, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in Rocker-Ringsfor Electrical Machines, of which the following is a specification.

My invention relates to electrical machines, and particularly torocker-rings for adjustably supporting the brush-holders and brushes ofelectrical generators or motors.

My invention was primarily designed for use in connection with electricmotors, but is also suitable for use in connection with generators androtary converters, and it is therefore to be regarded as of generalapplication to the extent that it may be used in connection with anyelectrical machine having brushes and brush-holders circumferentialadjustment of which is desired.

In the accompanying drawings, Figure 1 is a view, partially in sideelevation and partially in section, of an electrical machine providedwith my improvement; and Fig. 2 is an end elevation of a rocker-ringconstructed in accordance with my invention.

The motor frame or casing 1, which is provided on its interior withfield-magnet polepieces and which surrounds the armature, (not shown,)comprises an end bracket or extension 2, here shown as of frusto-conicalform and as bolted to the main portion of the easing. This end extensionor bracket 2 may be so constructed as to completely inclose thecommutator, or it may be of skeleton construc- 7 tion having openings 3,as indicated in Fig. l.

The commutator-cylinder 4 is supported upon the shaft 5 Within the frameextension 2, and the said shaft is provided with suitable bearings 6,one of which is shown in the drawings as supported upon an arm 7,projecting from the part 2.

Projecting inwardly from the outer end of the extension 2 is an annularflange 8, having a reduced bearing-surface 9 at its inner end, on whichis supported the rocker-ring 10. This ring is provided on its upper sidewith two lugs or projections 11, which are approximately ninety degreesapart, and each is provided with a pair of laterallyprojecting rods 12,upon which are mounted the brush-holders 13, the brushes lat being somounted therein as to make proper engagement with thecommutator-cylinder A.

Midway between the lugs 11 the ring is divided, so that the adjacentends are normally separated by a comparatively narrow space 15. At oneside of the space 15 the ring is provided with a lug 16, having aninclined bearing-surface 17. At the opposite side of the space 15 aclamping-dog 18 is pivotally supported by means of a pin 20, whichextends through one end of the dog and through a lug or projection 21with which the ring is provided. The dog is made hollow or of recessedform, so that it will lit over the lugs 16 and 21, and is provided witha nose 22, which engages the inclined surface 17. A screw-pin 23, havinga milled or knurled head 24, projects through a suitable opening in theback or upper surface of the dog and engages a screw-threaded opening inthe lug 16 and that portion of the ring to which it pertains.

It will be understood from the construction shown and described thatwhen the ring 10 is mounted upon the bearing 9 it may be clampedsecurely in position by turning the screw-pin 23 by means of the head24, since the free end of the clamping-dog will be thus forced inward,so as to act upon the inclined surface 17 and draw the adjacent ends ofthe ring together to effect the clamping action.

If it is desired for any reason to move the ring annularly in order toadjust the position of the brushes with reference to thecommutator-cylinder, this may be readily effected by the same means, itbeing merely necessary to turn the screw-pin in the opposite directionto that in ,which it was turned in order to efi'ect the clamping action,thus releasing the ends of the ring, and when it is loosened the pin 23may be utilized as a handle for adjusting the ring to the positiondesired, when it may be again clamped, as above described.

Variations in the details ofconstruction may obviously be made withoutdeparting from my invention, and I'desire it to be understood,therefore, that any such variations which do not change the mode ofoperation and result are within the scope of the invention.

I claim as my invention- 1. In an electrical machine, a ring divided atone side and having an inclined surface adjacent to the division, incombination with a clamping-dog having one end pivoted to the ringadjacent to the division but opposite the inclined surface and having anose engaging said surface and a screw-pin projecting through an openingin said dog and making a screw-thread engagement withsaid ring.

2. An electrical machine having a bracket provided with an annularsurface, in combination with a split ring mounted on said annularsurface and having an inclined surface adjacent to its opening, of a dogpivoted at one end to the ring at the opposite side of the opening andengaging the inclined surface at its free end and a locking-pinextending through an opening in the dog'and screwing into the adjacentportion of the ring.

3; The combination witha split rocker-ring for the brush-holders ofelectrical machines provided with a lug having a surface that isinclined with reference to the ring-radius, of a clamping device pivotedto said ring and engaging said lag, and a screw-pin projecting throughan opening in the clamping device and screwing into the ring.

- 4. A split rocker-ring for the brush-holders of electrical machineshaving a clamping-dog pivoted'thereto adjacent to the division thereinand a manually-operated device for adjusting said ring annularly on itssupport and for operating said dog to draw the ends of the ring togetherto clamp it in position.

5. In an electrical machine, the combination with a bracket having anannular surface, of a split rocker-ring mounted on said surface andhaving a pivoted clamping-dog and manually-operated means for adjustingthe ring annularly on its support and for operating the dog to clamp thering in its adjusted position.

6. A split rocker-ring for electrical machines having clam ping memberson its respective adjacent ends, one of which is pivotally mounted, anda thumb-screw for operating said members to draw the ends of the ringtoward each other.

chines having a-clamping-dog pivoted to one end and having aninclined-surface lug at its other end with which the 'free end of thedog engages and an adjusting and clamping screw that extends through anopening in the'dog and into the ring-body.

In testimony whereof I have hereunto subscribed my name this 12th day ofSeptember, 1903.

EDSON R. NORRIS.

Witnesses:

J. B. WALL, BIRNEY 'HINES.

7. A split rocker-ring for electrical ma

